Draft-regulator and spark-arrester.



r I, .H. STANNABD. DRAFT REGULATOR AND' SPARK ABRESIEH;

APPLICATIOH FILED AUG. 28, 191.6

1,245,284. 7 v Patented Nov. 6,1911

. I {Sufis -sham 1.

514mm v {Iilfifan n; a mi,

1. H. STANNARD. DRAFT REGULATOR AND SPARK ARRESTER.

I APPLICATION HLED AUGJB. 191B.

Patented Nov. 6, 191;.

2 SHEETS-SHEET 2- z wm eo oo ooyoo eaaa 0000 0000 0000 70000 oooo oooo 0000 0000 00 00 o boflo 3000 m 1 0 00 see co e 000 ooo see 000 oeo Ul o M ii 5944mm 7 6846K? UNITED" STATES PATENT.

, STMARD, COL'UMBIAY, SOUTH ,CAMLII TA;

nmr'r-aneunaroa arm sunk-anaemia.

1,245,284. eci en To all whom it concern:

Be it known that I. JOSEPH H. STANNABD, acitizen of the United States, residing at Columbia, in the county of .Richland and 'State of South Carolina, have invented new and useful Improvements in Draft-Regula tors and. Spark-Arresters, of which the following is aspecification;

This invention relates to steam boilers for engines, and the like, and hasparticular reference to a, combined spark arresterand draft regulator.

' This invention as itsobjects to providea spark arr-ester which will effectively prevent burning ciriders and the like from] being thrown from the boiler orengine and which might result in a disastrous tire; to

provide means 'for obtaining proper draft through ,the" engine and thus. provide an economy in the consumption of coal or other fuel; to provide means for so regulating the draft that the upper hues of the boiler as well; as the lower flues may at all times he employedf and generally-to obtain a lxitl'er,

'rno're equalized and stronger draft through the fire box and fire fines.

Other objects of the invention are to prolong the life of the flucs or other'parts ol the boiler by preventing rapid burning out of the same'due to improper drafts, and to provide means whereby the draft may be easily and quickly regulated. I i The above and other objects of the inven tion are obtained in the structure described in the following specilicati in and illus' trated in the accompanying drawings, and wherein- Y A Figured is a central longitudinal seoJ tional view taken through the front end of a locomotive engine and showing my inven tion appliedthereto,although it is to be uhderstood that my invention applicable for use in engines other than lmwmotives.

Fig. 21s a sectional view taken on line- 2-2; Fig. '1, and

Fig. Bis asectionnl view taken on line M, Fig. 1.

Referring to the drawings, wherein like numerals represent like parts in the several views, 10 designates the Usllal lmllvr having a, front tube sheet ll througluwhich the forward ends ol the fire llur-s 'lz project.

13' dresigmitcs the casing of the smoke box which may he of any improved construction and into WlllCll the lire Lulu-5 l1 'llgghgn-g nmeiramt Patented Nov. 6,1917.

Application filed August as, 1916. Serial Io. 111.292.

the box havingthe usual front door 14 whereby access to the interior of the boiler or engine may be had. pipe 15 leads from the upper 1ler 10 to the engine linder not shown) and the discharge nozz e 16 .is connected to "the exhaust portsthereoff The exhaust steam from the cylinder is discharged through the discharge nozzle 16 into the usual lifting ipe 17 whichis located oentrally beneatli the smoke stack. 18. The

c'allyrelative to the nozzle 16. 2 0 designates a baflleplate connected at its upper end to the tube sheet 11 immediately above the uppermost fire trbe 12 and extendingdownwardly and forwardly of -the smoke box .to' a distance ,approximately onehalf that'between the uppermost and The usual steam. art. of'the lifting pipe is adjustably carried by the brackets 19 so that it maybe adjusted verti- The minimum 20, as shown in the draw- I lugs, is pi ovidcd witha plurality 'of perforations which preferably are about onefourtl'i'inch in diameter, and located about one inch apart, although, of course, the size or exact location of the openings may be varied to' suit-the particular-engine to which my in ventiori is applied. The baflle phtc may be perforated throughout its entire height, but by preference, means for closing some of these perforations when desired, is provided, and while this means may be varied, l-have illustrated the samegas con'iprising a. plurality of strips 23 extends 1 ing transversely of the smoke'bq'x and securcd over the lower end of the balilelplate by means of suitablefnuts 24. 1

(rolled by means of" adamper25 which comprises a flat plate lying upon the upper y outer edge of the table plate and ilida mo able thereon. The tableplate and 11 y 10o With the above arrangement, when; it-is (Tam er are .su ported angleirons Ase-v cures to the sidhs of thesmoke box, ,and I havealso disclosed a bracket 26' which 18 secured at its forward end to the front wall of the smoke box, and whichha's-lts rear end resting on a shoulder of the exhaust nozzle 16. The damper orfplate 25 may be moved forwardly or backwardly' to vary the size of the opening 22, and it may be secured in adjusted osltion 1n any su1table manner, but in tile present instance, I

have shown the damper as having parallel slots 27 which receive suitable'bolts 28 passing through the table plate. By this conshown in the. drawings as damper into desired It is to be 'notedt at' the: table plate 21- structiom' when adjusting the damper, it is merely necessary to remove or loosen the nuts upon said bolts and then slide the osition.

extends forwardly of the smoke box to within la very short distance of the'front wall thereof, so'that the damper. opening 22 in comparison with the length. of the smoke box is relatively very narrow. No depend- .fing obstructions, such as ba'flie plates or the like project downwardly from the table platelfor I have found that obstructions of this sort impair the draft, in

that they shut off the top flues of the boiler. a To prevent cinders and the like from es- -eaping from the. smoke box of 'the engine,

I provide a'screen 29 which may be of any suitable construction, and which 1s extending up wardly and forwardly from the table plate to the front wall of the smokebox, and, of

course this screen or a part thereof may be removable to permit access to the ,interior openings in the baflleTp1ate'2O and the draft opening 22. j ijA -portion of the products of, f combustion are entrained of-the front endof the engine.

Dur'ngthe operation of the engine or boiler, smoke and other products of com bustion are discharged from the fire flues into the lower ortion of the smoke box. Exhaust steam is dischar ed from the ex haust nozzle'16 into the li expansion thereof, a vacuum is created in the upper iortion of the fire box and the products o 1 lower portion of the smoke box through the p in the opening between thelifting pipeand the'table plate; and the remaining portion ofthe products of combustion is. drawn or entrained into the smokepi 'e,due[to the partial vacuum creupper'h alf-of the box; in which a vacuum is maintainedwhen steam as disate'd at t e upper end ofil'the lifting pipe.

By extending the table plate to within; a;- short distan ce of'the front end ofthe smoke d box an 'exten'ded' chamber is provided in the partial Y charged from the exhaust nozzle.

'It will seen that the draft may be com ting pipe'17 and- I due to the pressure of the steam and the.

'c'on'ilmstion are drawn from the.

tending from the-lower e d of ai imam trolled by adjusting or regulating the lifting pipe the amper 25, orthe openmgs through the ing means are dependent on the others, and the adjustment of all of v them should be such "that astrong and equalized draft 1s obtained through all of the fire lines. If it is'found that the upper flues do not draw properly; the damper 25 is moved toward the front of the smoke box so as to make the draftopening 22 smaller, andthus a stronger draft is obtained through the opening 22, resulting in a. strong suction throughthe openings in the baflie plate 20, so that the draft through the various fire flues 1s equalized and the upper as well as the lower -flues are equally employed. On the other .hand, if it is found that thelower flues do not draw properly, the opening 22 is made larger. By properly adjusting the damper 22, a strong draft is-obta'ined which results a in the proper heating of the water within the boiler, proper consumption of the fuel; and, the ellmination to a great extent of burning 'cinders and .the like. Should, how ever any burning cinderspass into the smo e box these are prevented from passing through the smoke stack by means of the draft beneath the bafile plates is uninterrupted, and yet this space is of suflicient length to causevmost of thecinders to fall to the bottom of the smoke box, I

bafiie plate 20. Each of these regulatscreen 29; It will be further noted that the This invention is susceptible of various modifications'and changes which would be ithin the spirit of my invention without departing fromthe scope of the following :claiins. What I'claim is '1. The combination with a smoke box, of a bafiie plate extending forwardly and then depending downwardly of the smoke box and having draft openings in the down-- wardly directed port on through which the products ofcombustion may pass from the j oiler tubes to thesmoke staek,. said draft openings opening directly into the'upper I portion of the smoke box, and an nnperfo:

rate tablgfiplate connected tothe lower end ,of the'smoke boxto a font end thereof a draft of the p e plate and extending horizontally and forwardl point adjalcemi the g o ening of re atively small area being rovi ded at the front p holler to which the device is applied. v

2". The combination with' a smoke'box ofa baflie plate extending. forwardly and then downwardly of the smoke box and having raft openings. through which the products of. comb v end of the, smoke box to regulate the draft through the tubes of a ustion may pass from the boiler tubes-to the smoke-stack, said draft openings o ening directly into the-upper portion'of 3 late t e smoke box, ,animperforate tablg' afiie r 1. mm-

plate.

3.-The combination with a smoke box, of a baflle plate extending forwardly and then depending downward y of the smoke box and having a plurality of draft openinlgs opening into'the upper portion of the smo e box, means for closing some of said openings, an imperforate table late connected to the baffle late and extending horizontally and forwar 1y of the smoke box and almost to the front end thereof, a draft opening at the front of the smoke box bein thus provided, and a damper for regu ating said draft opening. i

4. The combination with a smoke box, of

' a baflle plate extending forwardly and then downwardly of the smoke box and having draft openings through which the products of combustion may ass from the boiler tubes to the smoke stac an imperforate table 11 late connected to the lower end of tha -depending downwardfy afile plate and extending horizontally and forwardly ofthe smoke ,box to a point adjacent the front end thereof, a draft 0 ening of relative l' small area being provi ed at the front 0 the smoke box, and means for refi lating the draft 0 "nings through the front end of said box.

e plate and said raft opening at the 5. The combination with a smoke box, of a baflie plate extending forwardlyand de- ,nding downwardly of the smoke box and aving draft openings,-a plurality of strips overlying said bafie plate to close some of the openings therein and being independ-' ently removable to regulate the number of openings an imperforate table plate con--. nected td the lower end ofthe baflie plate and extending horizontally and forwardly of the smoke box toa oint adjacent the 49 front end thereof, a dm ,0 ning of relatively small area being provi ed at the front end of the smoke box, and a damper comprising a slidable plate adjustablyoonneeted to the table plate for regulating said draft opening. g v i 6. The combination with a' smoke box, of an exhaust nozzle, a liftingpipe, means for regulating said pi e'and a stack, of a baflle plateextending orwardl and depending downwardly of the smbke ox and havin a pluralit of draft 0 enings through which the stno e may pass rom the boiler tubes to the smoke stack, means for closin some of said openings, an imperforateta 1e plated -connected to the baflle late and extending horizontally and forwar lyto within a short distance ofthe front end of the smoke box, a relatively narrow draft openin atthe front end of the smoke box bein t usp'rovided, and a damper for regu ating said draft opening. p

7. The combination with asmoke boxof a baflie plate vextendi forwardly and then in the'smoke box and having draft openingsfa' plurality of strips overlying said baflle plate andbeing independently removable. to regulate the draft openings, an imperforate table "plate connected to the lower end of the baflie plate and extending, horizontally and forwardly in the smoke box to a point adjacent the front end thereof, and adraft opening of relatively small area located at the front, end of the smoke box. y

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

Witnesses: I

B. MCBRIDE, H. T. Sum-Far. 

